Details about SIM:
The SIM full form is Subscriber Identity Module. A smart card called the Subscriber Identity Module (SIM) is required in order to utilize a mobile phone for communication. The international mobile subscriber identity (IMSI) number, which is used to identify and authenticate subscribers on mobile telephone systems, is designed to be securely stored on the SIM, an integrated circuit. Additionally, the SIM has memory for personal information like a phone book and messages.
A SIM card has two passwords: a personal identification number (PIN) for everyday use and a personal unblocking code (PUC) for PIN unlocking. It also has its unique serial number (ICCID), international mobile subscriber identity (IMSI) number, security authentication and ciphering information, temporary information related to the local network, a list of the services the user has access to, and security authentication and ciphering information.
The two passwords (PIN and PUK) mentioned above protect the use of the Subscriber Identity Module; the password is typically 4 to 8 digits long. It’s not always necessary to use a PIN. Sim base M2M/IoT cards do not support the PIN for faster Internet of Things device setup. If a SIM card is inserted into a phone, a subscriber may use any mobile device on their own account. SIM cards now come in three sizes: Common SIM 2FF (15 x 25mm) Nano-SIM 4FF Micro SIM 3FF (12 x 15mm (8.8 x 12.3mm).
Information’s SIM card stores:
The SIM full form is the Subscriber Identity Module, which includes some of your personal data in addition to the data required to connect to and from your network.
- Call-in number
- contact book
- data on network authorization
- SMS messages
- keys for personal security
- Additional information
Additionally, a SIM carries its individual serial number (ICCID), International Mobile Subscriber Identity (IMSI), security data, encryption data, temporary network data, etc.